The other day I had a strange experience: I couldn’t access my external harddrives. They were plugged in, and the system acknowledged it (by sound) but they were not visible in Explorer or anywhere else.

Then in Device Manager, I could see that something was wrong, and got the message that an old driver was present in memory.

Then, probably somewhere in Device Manager, I could check for problems and ask them to be solved. After a while, it said it had tried to solve the problem, and asked me to reboot. (But no explanation).

Then the problem was solved!

I am a little new to Windows 10, but I was somewhat surprised at the whole thing.